Bug 2383391 (CVE-2025-38399)

Summary: CVE-2025-38399 kernel: scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-25 14:02:07 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: target: Fix NULL pointer dereference in core_scsi3_decode_spec_i_port()

The function core_scsi3_decode_spec_i_port(), in its error code path,
unconditionally calls core_scsi3_lunacl_undepend_item() passing the
dest_se_deve pointer, which may be NULL.

This can lead to a NULL pointer dereference if dest_se_deve remains
unset.

SPC-3 PR SPEC_I_PT: Unable to locate dest_tpg
Unable to handle kernel paging request at virtual address dfff800000000012
Call trace:
  core_scsi3_lunacl_undepend_item+0x2c/0xf0 [target_core_mod] (P)
  core_scsi3_decode_spec_i_port+0x120c/0x1c30 [target_core_mod]
  core_scsi3_emulate_pro_register+0x6b8/0xcd8 [target_core_mod]
  target_scsi3_emulate_pr_out+0x56c/0x840 [target_core_mod]

Fix this by adding a NULL check before calling
core_scsi3_lunacl_undepend_item()
Comment 1 Jon Moroney 2025-07-25 19:36:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072510-CVE-2025-38399-00ec@gregkh/T